Air filtration
United States Patent 3204391

Inventors:
Louis, Schwab
Publication Date:
09/07/1965
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Assignee:
Louis, Schwab
Primary Class:
55/374
Other Classes:
210/338, 55/380, 55/490, 210/447, 210/448, 55/DIG.002, 55/487, 210/315
International Classes:
B01D46/02
US Patent References:
2327225Suction cleaning apparatus
2732911
2804166Dust containers for vacuum cleaners
2833372Vacuum cleaner equipped with disposable bag
2964127Gas filtering apparatus
Foreign References:
FR701447A
GB395814A